From patchwork Tue Jul 30 05:15:57 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Al Viro X-Patchwork-Id: 13746639 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 28F6E1922E1; Tue, 30 Jul 2024 05:14:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722316497; cv=none; b=ao1vm7mHlyscJhHP6/6FBztPZs+wNrPW/08ARgLTUHdbKf601xRi2NtTpysjwCBD4PONmMfDejkYcp8eIqFiRbeokISsRr9IgqQyNf0GPqiJ8sw2ETTMfxyDDmVL8hVXBJ1/57/pSzWqOCWzG5in6/czYHh1Rabbte4am3k9DBA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722316497; c=relaxed/simple; bh=nsP5fCdu1d1453OnOXOtXraSy508jAD7L0TWBTzmIE0=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=aKmq6eePzTX0h4PAp+FdWGbwG44dwnn0KbQ9mZVWb1b4CwZDnyJXwK2UpVGIexvfREf0WxP1HFvEFurymQ2LUCxhh3Zxv26AAflxuVivznN59oXGEJO0sqo+yOXAuF6k7eZdCSeKQYbBM0MjRK2cpRgzqaq5cvqAqpGu4g5jf0c= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=EwFM7FXV; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="EwFM7FXV" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 50DE6C4AF0A; Tue, 30 Jul 2024 05:14:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1722316497; bh=nsP5fCdu1d1453OnOXOtXraSy508jAD7L0TWBTzmIE0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EwFM7FXVXYxCg1IOYXk/3YQoOIRFVN1nWDfxuETBiBcZNdH3Rg0QWRjJ5m+nqQwx/ oKB2yMiO9VoSaPeLOqVkHci7lzZ2MGAFMZXFCFtlba5P9N54JtbqGl1ZnBr0+yblEH UvudrbKr3AlAIDoRbVDRH4x4KjPeyaPj9Azk382RPRBZ8SnPqc9M/GdTfk3YJL7djK 6bZQ5lccv5SLW1RDPULhsph7Al/WBljhyj0Qhjm0vWszdtWCEsjK0sixiGZ5OAGNYX T2LLSlmw1igRkzCoEoTmazU4PuqaFsekJVJpMRIn+IABYows8LGb28RaFICFKX9kY2 mQVkcehFPn7Ag== From: viro@kernel.org To: linux-fsdevel@vger.kernel.org Cc: amir73il@gmail.com, bpf@vger.kernel.org, brauner@kernel.org, cgroups@vger.kernel.org, kvm@vger.kernel.org, netdev@vger.kernel.org, torvalds@linux-foundation.org Subject: [PATCH 11/39] switch netlink_getsockbyfilp() to taking descriptor Date: Tue, 30 Jul 2024 01:15:57 -0400 Message-Id: <20240730051625.14349-11-viro@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240730051625.14349-1-viro@kernel.org> References: <20240730050927.GC5334@ZenIV> <20240730051625.14349-1-viro@kernel.org> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Al Viro Signed-off-by: Al Viro Reviewed-by: Christian Brauner --- include/linux/netlink.h | 2 +- ipc/mqueue.c | 8 +------- net/netlink/af_netlink.c | 9 +++++++-- 3 files changed, 9 insertions(+), 10 deletions(-) diff --git a/include/linux/netlink.h b/include/linux/netlink.h index b332c2048c75..a48a30842d84 100644 --- a/include/linux/netlink.h +++ b/include/linux/netlink.h @@ -239,7 +239,7 @@ int netlink_register_notifier(struct notifier_block *nb); int netlink_unregister_notifier(struct notifier_block *nb); /* finegrained unicast helpers: */ -struct sock *netlink_getsockbyfilp(struct file *filp); +struct sock *netlink_getsockbyfd(int fd); int netlink_attachskb(struct sock *sk, struct sk_buff *skb, long *timeo, struct sock *ssk); void netlink_detachskb(struct sock *sk, struct sk_buff *skb); diff --git a/ipc/mqueue.c b/ipc/mqueue.c index 34fa0bd8bb11..fd05e3d4f7b6 100644 --- a/ipc/mqueue.c +++ b/ipc/mqueue.c @@ -1355,13 +1355,7 @@ static int do_mq_notify(mqd_t mqdes, const struct sigevent *notification) skb_put(nc, NOTIFY_COOKIE_LEN); /* and attach it to the socket */ retry: - f = fdget(notification->sigev_signo); - if (!fd_file(f)) { - ret = -EBADF; - goto out; - } - sock = netlink_getsockbyfilp(fd_file(f)); - fdput(f); + sock = netlink_getsockbyfd(notification->sigev_signo); if (IS_ERR(sock)) { ret = PTR_ERR(sock); goto free_skb; diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c index 0b7a89db3ab7..42451ac355d0 100644 --- a/net/netlink/af_netlink.c +++ b/net/netlink/af_netlink.c @@ -1180,11 +1180,16 @@ static struct sock *netlink_getsockbyportid(struct sock *ssk, u32 portid) return sock; } -struct sock *netlink_getsockbyfilp(struct file *filp) +struct sock *netlink_getsockbyfd(int fd) { - struct inode *inode = file_inode(filp); + CLASS(fd, f)(fd); + struct inode *inode; struct sock *sock; + if (fd_empty(f)) + return ERR_PTR(-EBADF); + + inode = file_inode(fd_file(f)); if (!S_ISSOCK(inode->i_mode)) return ERR_PTR(-ENOTSOCK);